Cards featuring characters making their first Lorcana Enchanted appearance typically hold value best
If you can trigger this constantly, you can eliminate them in one turn, but it requires some setup
Also, dont forget your Teleportation Circle
Notably, destroying Battles directly will not flip them - you need to remove all of the counters 'fairly' to get to the goodies
An impressively deep leaderboard system will also be launching sometime next month, tracking not just how you stack up against other players, but also ranking participants on things like how many prize cards they've taken
A staple of 5-color domain decks, Leyline Binding is one of the best and cheapest versions of this effect, and as such, its seen play in many formats